七月的平均气温是25摄氏度。

The ___mean temperature for July was 25°C.

计算平均分有助于找出班级的平均水平。

Calculating the ___mean score helps identify the class average.

调查显示，城市地区的平均收入明显更高。

In the survey, the ___mean income was significantly higher in urban areas.